{"id":2254,"date":"2025-08-27T19:03:51","date_gmt":"2025-08-27T11:03:51","guid":{"rendered":"https:\/\/note.ui11.cc\/?p=2254"},"modified":"2025-08-28T11:51:55","modified_gmt":"2025-08-28T03:51:55","slug":"%e9%9d%a2%e8%af%95%e5%87%86%e5%a4%87","status":"publish","type":"post","link":"https:\/\/note.ui11.cc\/index.php\/2025\/08\/27\/%e9%9d%a2%e8%af%95%e5%87%86%e5%a4%87\/","title":{"rendered":"\u9762\u8bd5\u4e4bRedis"},"content":{"rendered":"\n

\u7b2c\u4e00\u7bc7\u3002redis\u590d\u4e60<\/strong><\/p>\n\n\n\n

reids\u4f7f\u7528\u573a\u666f\uff1a<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u4e00\uff1a\u7f13\u5b58\u7a7f\u900f<\/strong><\/p>\n\n\n\n

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\"\"<\/div><\/figure>\n\n\n\n

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\"\"<\/div><\/figure>\n\n\n\n

\u5e03\u9686\u8fc7\u6ee4\u5668\uff1a<\/strong><\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

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\u5e03\u9686\u8fc7\u6ee4\u5668\u53ef\u80fd\u4ea7\u751f\u8bef\u5224<\/p>\n\n\n\n

\u5e03\u9686\u8fc7\u6ee4\u5668\u672c\u8d28\u662f\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6570\u7ec4\uff08bit array\uff0c\u6bcf\u4e2a\u5143\u7d20\u53ea\u6709 0\/1 \u4e24\u79cd\u72b6\u6001\uff09<\/strong> + \u591a\u4e2a\u72ec\u7acb\u7684\u54c8\u5e0c\u51fd\u6570<\/strong>\uff0c\u5b83\u4e0d\u5b58\u50a8 \u201c\u503c\u672c\u8eab\u201d\uff0c\u53ea\u5b58\u50a8 \u201c\u503c\u5b58\u5728\u7684\u75d5\u8ff9\u201d<\/p>\n\n\n\n

\u4e8c\u3001\u5173\u952e\u903b\u8f91\uff1a\u5e03\u9686\u8fc7\u6ee4\u5668\u4e0e MySQL \u7684 \u201c\u6570\u636e\u540c\u6b65\u5173\u7cfb\u201d<\/h3>\n\n\n\n

\u5e03\u9686\u8fc7\u6ee4\u5668\u7684 \u201c\u96f6\u5047\u9634\u6027\u201d\uff08\u5224\u65ad\u4e0d\u5b58\u5728\u5219\u4e00\u5b9a\u4e0d\u5b58\u5728\uff09\uff0c\u9700\u8981\u4e00\u4e2a\u524d\u63d0\uff1a\u6240\u6709 MySQL \u4e2d \u201c\u5b58\u5728\u7684\u503c\u201d\uff0c\u90fd\u5df2\u7ecf\u63d0\u524d\u5199\u5165\u4e86\u5e03\u9686\u8fc7\u6ee4\u5668<\/strong>\u3002<\/p>\n\n\n\n

\u5728\u5b9e\u9645\u4e1a\u52a1\u4e2d\uff0c\u8fd9\u4e2a\u524d\u63d0\u662f\u901a\u8fc7 \u201c\u6570\u636e\u5199\u5165\u6d41\u7a0b\u7684\u5f3a\u7ed1\u5b9a\u201d \u5b9e\u73b0\u7684\uff1a<\/p>\n\n\n\n

    \n
  • \u5f53\u6211\u4eec\u5411 MySQL \u63d2\u5165\u4e00\u6761\u65b0\u6570\u636e\uff08\u6bd4\u5982\u65b0\u589e user_id=789<\/code>\uff09\u65f6\uff0c\u4f1a\u540c\u6b65\u6267\u884c \u201c\u5c06\u8be5\u503c\u5199\u5165\u5e03\u9686\u8fc7\u6ee4\u5668\u201d \u7684\u64cd\u4f5c<\/strong>\uff08\u5373\u5b8c\u6210\u4e0a\u8ff0 \u201c\u54c8\u5e0c\u6620\u5c04 + \u4f4d\u8bbe\u4e3a 1\u201d \u7684\u6b65\u9aa4\uff09\uff1b<\/li>\n\n\n\n
  • \u5f53 MySQL \u4e2d\u5220\u9664\u4e00\u6761\u6570\u636e\u65f6\uff08\u867d\u7136\u5e03\u9686\u8fc7\u6ee4\u5668\u4e0d\u652f\u6301\u76f4\u63a5\u5220\uff0c\u4f46\u53ef\u901a\u8fc7 \u201c\u5b9a\u671f\u91cd\u5efa\u5e03\u9686\u8fc7\u6ee4\u5668\u201d \u786e\u4fdd\u4e00\u81f4\u6027\uff1a\u7528 MySQL \u73b0\u6709\u6240\u6709\u6570\u636e\u91cd\u65b0\u6784\u5efa\u4e00\u4e2a\u65b0\u7684\u5e03\u9686\u8fc7\u6ee4\u5668\uff0c\u66ff\u6362\u65e7\u7684\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n

    \u4e8c\uff1a\u7f13\u5b58\u51fb\u7a7f<\/strong><\/p>\n\n\n\n

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    \"\"<\/div><\/figure>\n\n\n\n

    \u4e92\u65a5\u9501\u53ef\u4ee5\u4fdd\u8bc1\u6570\u636e\u5f3a\u4e00\u76f4\u6027\uff0c\u7f3a\u70b9\u5c31\u662f\u6027\u80fd\u5dee<\/p>\n\n\n\n

    \u903b\u8f91\u8fc7\u671f\uff1a\u9ad8\u53ef\u7528\uff0c\u6027\u80fd\u4f18<\/p>\n\n\n\n

    \u6839\u636e\u5177\u4f53\u4e1a\u52a1\u573a\u666f\u8fdb\u884c\u9009\u62e9<\/p>\n\n\n\n

    \u603b\u7ed3\uff1a<\/p>\n\n\n\n

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    \"\"<\/div><\/figure>\n\n\n\n

    \u4e09\uff1a\u7f13\u5b58\u96ea\u5d29<\/strong><\/p>\n\n\n\n

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    \u603b\u7ed3\uff1a<\/p>\n\n\n\n

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    <\/p>\n\n\n\n

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    \u56db \u53cc\u5199\u4e00\u81f4\uff1a<\/strong><\/p>\n\n\n\n

    \u95ee\uff1aredis\u4f5c\u4e3a\u7f13\u5b58\uff0cmysql\u7684\u6570\u636e\u5982\u4f55\u4e0eredis\u8fdb\u884c\u540c\u6b65\u5462\uff1f\uff08\u53cc\u5199\u4e00\u81f4\u6027\uff09<\/p>\n\n\n\n

    \u7b2c\u4e00\u79cd\u60c5\u51b5\uff1a\u8981\u6c42\u5f3a\u4e00\u81f4\u6027<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n

    \u8bfb\u5199\u9501\uff1a<\/p>\n\n\n\n

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    \u6392\u4ed6\u9501\uff1a<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u7b2c\u4e8c\u79cd\u60c5\u51b5\uff08\u53ef\u4ee5\u63a5\u6536\u77ed\u6682\u4e0d\u4e00\u81f4\uff09\uff1a<\/p>\n\n\n\n

    \u65b9\u6848\u4e00\uff1a<\/p>\n\n\n\n

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    \"\"<\/div><\/figure>\n\n\n\n

    \u65b9\u6848\u4e8c\uff1a<\/p>\n\n\n\n

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    <\/p>\n\n\n\n

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    \u603b\u7ed3\uff1a<\/p>\n\n\n\n

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    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n

    <\/p>\n\n\n\n

    \u4e94\uff1aredis\u6301\u4e45\u5316<\/strong><\/p>\n\n\n\n

    \u65b9\u5f0f\u4e00\uff1aRDB<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n

    \u65b9\u5f0f\u4e8c\uff1aAOF<\/p>\n\n\n\n

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    RDB\u548caof\u5728redis\u6570\u636e\u5931\u6548\u91cd\u542f\u540e\u5982\u679c\u67e5\u8be2\u5230\u6709rdb\u6216\u8005aof\u6587\u4ef6\u4f1a\u81ea\u52a8\u6062\u590d\uff0c\u65e0\u9700\u4eba\u5de5\u5e72\u9884<\/p>\n\n\n\n

    AOF \u548c RDB \u6587\u4ef6\u4e0d\u5b58\u5728\u5185\u5b58\u4e2d<\/strong>\uff0c\u800c\u662f\u6301\u4e45\u5316\u5b58\u50a8\u5728\u78c1\u76d8\u4e2d<\/strong>\u7684\u6587\u4ef6 \u2014\u2014 \u8fd9\u6b63\u662f Redis \u201c\u6301\u4e45\u5316\u201d \u7684\u6838\u5fc3\u610f\u4e49\uff1a\u5c06\u5185\u5b58\u4e2d\u6613\u5931\u7684\u6570\u636e\uff08\u65ad\u7535 \/ \u91cd\u542f\u5373\u4e22\u5931\uff09\u4fdd\u5b58\u5230\u78c1\u76d8\uff0c\u907f\u514d\u6570\u636e\u56e0\u670d\u52a1\u4e2d\u65ad\u800c\u4e22\u5931\u3002<\/p>\n\n\n\n

    \u516d\uff1a\u6570\u636e\u8fc7\u671f\u7b56\u7565\uff1a<\/strong><\/p>\n\n\n\n

    \u95ee\uff1a\u5047\u5982redis\u7684key\u8fc7\u671f\u540e\uff0c\u4f1a\u7acb\u5373\u5220\u9664\u5417<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u6709\u4e24\u79cd\u89e3\u51b3\u65b9\u6848\uff0c\u7b2c\u4e00\u79cd \u60f0\u6027\u5220\u9664 \u7b2c\u4e8c\u79cd \u7acb\u5373\u5220\u9664<\/p>\n\n\n\n

    \u60f0\u6027\u5220\u9664\uff1a
    <\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u5b9a\u671f\u5220\u9664\uff1a<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n

    \u603b\u7ed3\uff1a<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n

    \u4e03\uff1a\u6570\u636e\u6dd8\u6c70\u7b56\u7565\uff1a<\/strong><\/p>\n\n\n\n


    <\/strong>\u95ee\uff1a\u5047\u5982\u7f13\u5b58\u8fc7\u591a\uff0c\u5185\u5b58\u662f\u6709\u9650\u7684\uff0c\u5185\u5b58\u88ab\u5360\u6ee1\u4e86\u600e\u4e48\u529e\uff1f<\/p>\n\n\n\n

    \u5176\u5b9e\u5c31\u662f\u60f3\u95eeredis\u7684\u6570\u636e\u6dd8\u6c70\u7b56\u7565\u662f\u4ec0\u4e48<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n

    \u95ee\u9898\u516b\uff1a\u5206\u5e03\u5f0f\u9501<\/p>\n\n\n\n

    \u62a2\u5377\u573a\u666f\uff1a<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u4e5f\u5c31\u662f\u8d85\u5356\u73b0\u8c61\uff0c\u7531\u4e8e\u7ebf\u7a0b\u662f\u4ea4\u66ff\u6267\u884c\uff0c\u5982\u679c\u7b2c\u4e00\u4e2a\u8fd8\u5269\u4e00\u4e2a\uff0c\u5728\u7b2c\u4e00\u4e2a\u7ebf\u7a0b\u6263\u51cf\u5e93\u5b58\u4e4b\u524d\uff0c\u7b2c\u4e8c\u4e2a\u7ebf\u7a0b\u53c8\u67e5\u8be2\u5e93\u5b58\u4e3a\u4e00\uff0c\u8fd9\u6837\u4e24\u4e2a\u7ebf\u7a0b\u5c31\u4f1a\u6263\u51cf\u4e24\u6b21\uff0c\u6700\u7ec8\u5e93\u5b58\u4e3a-1<\/p>\n\n\n\n

    \u7b2c\u4e00\u79cd\u65b9\u6cd5\u52a0\u9501\uff1asynchronized<\/p>\n\n\n\n

    \u5982\u679c\u662f\u5355\u4f53\u9879\u76ee\u6ca1\u95ee\u9898\uff0c\u5982\u679c\u662f\u96c6\u7fa4\u6a21\u5f0f\uff0c\u5c31\u4e0d\u884c\u4e86<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n

    synchronized\u5c5e\u4e8ejvm\uff0c\u6bcf\u4e2a\u670d\u52a1\u5668\u90fd\u6709\u5404\u81ea\u7684jvm<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u8fd9\u5c31\u662f\u5206\u5e03\u5f0f\u9501<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    redisson\u5176\u5b9e\u5df2\u7ecf\u5c01\u88c5\u597d\u4e86\u73b0\u6210\u7684\u5206\u5e03\u5f0f\u9501\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u5047\u5982\u9501\u7684\u91ca\u653e\u65f6\u95f4\u662f30\u79d2\uff0c\u5982\u679c\u4e1a\u52a1\u8fd8\u6ca1\u5b8c\u6210\uff0c\u90a3\u4e48\u770b\u95e8\u72d7\u5c31\u4f1a\u4ee510\u79d2\u7684\u65f6\u95f4\u8fdb\u884c\u7eed\u671f<\/p>\n\n\n\n

    \u5982\u679c\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u672a\u62a2\u5230\u9501\uff0c\u90a3\u4e48\u5c31\u4f1a\u89e6\u53d1redisson\u7684\u91cd\u8bd5\u673a\u5236\uff0c\u5230\u4e00\u5b9a\u6b21\u6570\u53ef\u4ee5\u505c\u6b62<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u5982\u679c\u586b\u4e86\u9501\u7684\u91ca\u653e\u65f6\u95f4\uff0c\u90a3\u4e48redisson\u5c31\u4f1a\u53d6\u6d88\u770b\u95e8\u72d7\uff0c\u4e0d\u4f1a\u7ed9\u4f60\u7eed\u671f\uff0c\u5426\u5219\u4f1a\u7eed\u671f<\/p>\n\n\n\n

    redisson\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501\u53ef\u91cd\u5165<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u5982\u679c\u662f\u7b2c\u4e00\u4e2a\u9501\u90a3\u4e48value\u5c31\u662f1\uff0c\u518d\u52a0\u4e00\u4e2a\u9501\u5c31\u4f1a\u662f2\uff0c\u91ca\u653e\u9501\u540e\u51cf\u4e00\uff0c\u91ca\u653e\u9501<\/p>\n\n\n\n

    redisson\u4e3b\u4ece\u4e00\u81f4\u6027\uff1a\u5982\u679c\u4e3b\u8282\u70b9\uff08\u7528\u6765\u5199\u64cd\u4f5c\uff09\uff0c\u4ece\u8282\u70b9\uff08\u7528\u6765\u8bfb\u64cd\u4f5c\uff09\uff0c\u5982\u679c\u4e3b\u8282\u70b9\u5b95\u673a\u540e\uff0c\u90a3\u4e48\u5c31\u4f1a\u9009\u62e9\u4e00\u4e2a\u4ece\u8282\u70b9\u5f53\u505a\u4e3b\u8282\u70b9<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u89e3\u51b3\u65b9\u6cd5\uff1aRedLock(\u7ea2\u9501\uff09<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u7ea2\u9501\u7f3a\u70b9\uff1a<\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n
    \u7ea2\u9501<\/summary>\n

    \u8981\u7406\u89e3 \u7ea2\u9501\uff08Redlock\uff09<\/strong>\uff0c\u9996\u5148\u9700\u660e\u786e\u5176\u6838\u5fc3\u5b9a\u4f4d\uff1a\u5b83\u662f Redis \u5b98\u65b9\u63d0\u51fa\u7684\u4e00\u79cd\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u65b9\u6848<\/strong>\uff0c\u7528\u4e8e\u89e3\u51b3\u5355\u673a Redis \u9501\u5728 \u201c\u4e3b\u4ece\u67b6\u6784 \/ \u96c6\u7fa4\u73af\u5883\u4e0b\u7684\u53ef\u9760\u6027\u95ee\u9898\u201d\u2014\u2014 \u672c\u8d28\u662f\u901a\u8fc7\u591a\u8282\u70b9\u5197\u4f59\uff0c\u89c4\u907f\u5355\u8282\u70b9\u6545\u969c\u5bfc\u81f4\u7684\u9501\u5931\u6548\u98ce\u9669\uff0c\u786e\u4fdd\u5206\u5e03\u5f0f\u573a\u666f\u4e0b\u9501\u7684 \u201c\u5b89\u5168\u6027\u201d \u4e0e \u201c\u53ef\u7528\u6027\u201d\u3002<\/p>\n\n\n\n

    \u4e00\u3001\u7ea2\u9501\uff08Redlock\uff09\u7684\u8bde\u751f\u80cc\u666f\uff1a\u89e3\u51b3\u5355\u673a Redis \u9501\u7684\u81f4\u547d\u7f3a\u9677<\/h3>\n\n\n\n

    \u5728\u4e86\u89e3\u7ea2\u9501\u524d\uff0c\u9700\u5148\u660e\u786e\u5176\u8981\u89e3\u51b3\u7684\u6838\u5fc3\u95ee\u9898\uff1a\u5355\u673a Redis \u9501\u5728\u4e3b\u4ece\u67b6\u6784\u4e0b\u7684 \u201c\u9501\u4e22\u5931\u201d \u98ce\u9669<\/strong>\u3002<\/p>\n\n\n\n

    \u5e38\u89c4\u7684\u5355\u673a Redis \u9501\uff08\u5982\u7528 SET key value NX EX<\/code> \u547d\u4ee4\u5b9e\u73b0\uff09\u903b\u8f91\u662f\uff1a\u5ba2\u6237\u7aef\u5411 Redis \u8282\u70b9\u53d1\u9001 \u201c\u4e92\u65a5\u6307\u4ee4\u201d\uff0c\u6210\u529f\u5219\u83b7\u53d6\u9501\uff0c\u5931\u8d25\u5219\u7b49\u5f85 \/ \u653e\u5f03\u3002\u4f46\u5728 Redis \u4e3b\u4ece\u67b6\u6784\u4e2d\uff0c\u5b58\u5728\u4e00\u4e2a\u81f4\u547d\u95ee\u9898\uff1a<\/p>\n\n\n\n

      \n
    • Redis \u4e3b\u4ece\u590d\u5236\u662f\u5f02\u6b65<\/strong>\u7684\uff1a\u4e3b\u8282\u70b9\uff08Master\uff09\u5904\u7406\u5b8c\u9501\u8bf7\u6c42\uff08\u5982 SET lock 1 NX EX 10<\/code>\uff09\u540e\uff0c\u4f1a\u76f4\u63a5\u8fd4\u56de \u201c\u9501\u6210\u529f\u201d\uff0c\u4f46\u6570\u636e\u540c\u6b65\u5230\u4ece\u8282\u70b9\uff08Slave\uff09\u9700\u8981\u65f6\u95f4\u3002<\/li>\n\n\n\n
    • \u82e5\u4e3b\u8282\u70b9\u5728\u540c\u6b65\u9501\u6570\u636e\u5230\u4ece\u8282\u70b9\u524d\u7a81\u7136\u5b95\u673a\uff0c\u54e8\u5175 \/ \u96c6\u7fa4\u4f1a\u5c06\u4ece\u8282\u70b9\u63d0\u5347\u4e3a\u65b0\u4e3b\u8282\u70b9\u3002\u6b64\u65f6\u65b0\u4e3b\u8282\u70b9\u4e2d\u6ca1\u6709\u4e4b\u524d\u7684\u9501\u8bb0\u5f55<\/strong>\uff0c\u5176\u4ed6\u5ba2\u6237\u7aef\u4f1a\u8bef\u4ee5\u4e3a \u201c\u9501\u5df2\u91ca\u653e\u201d\uff0c\u91cd\u65b0\u83b7\u53d6\u5230\u9501 \u2014\u2014 \u5bfc\u81f4 \u201c\u4e00\u628a\u9501\u88ab\u4e24\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u6301\u6709\u201d\uff0c\u7834\u574f\u9501\u7684 \u201c\u4e92\u65a5\u6027\u201d\uff0c\u5f15\u53d1\u4e1a\u52a1\u6570\u636e\u51b2\u7a81\uff08\u5982\u91cd\u590d\u4e0b\u5355\u3001\u5e76\u53d1\u4fee\u6539\u540c\u4e00\u6570\u636e\uff09\u3002<\/li>\n<\/ul>\n\n\n\n

      \u7ea2\u9501\u7684\u8bbe\u8ba1\u76ee\u6807\uff0c\u5c31\u662f\u901a\u8fc7\u591a\u72ec\u7acb Redis \u8282\u70b9\u7684\u5197\u4f59<\/strong>\uff0c\u5f7b\u5e95\u89e3\u51b3\u8fd9\u79cd \u201c\u5355\u8282\u70b9\u6545\u969c\u5bfc\u81f4\u7684\u9501\u4e22\u5931\u201d \u95ee\u9898\u3002<\/p>\n\n\n\n

      \u4e8c\u3001\u7ea2\u9501\uff08Redlock\uff09\u7684\u6838\u5fc3\u539f\u7406\uff1a\u201c\u591a\u8282\u70b9\u6295\u7968\uff0c\u5c11\u6570\u670d\u4ece\u591a\u6570\u201d<\/h3>\n\n\n\n

      \u7ea2\u9501\u7684\u6838\u5fc3\u903b\u8f91\u57fa\u4e8e \u201c\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u5197\u4f59\u5bb9\u9519\u601d\u60f3\u201d\uff0c\u5177\u4f53\u5b9e\u73b0\u9700\u6ee1\u8db3\u4e24\u4e2a\u524d\u63d0\uff1a<\/p>\n\n\n\n

        \n
      1. \u90e8\u7f72 N \u4e2a\u72ec\u7acb\u7684 Redis \u8282\u70b9<\/strong>\uff08\u901a\u5e38 N=5\uff0c\u5947\u6570\uff0c\u907f\u514d\u6295\u7968\u5e73\u5c40\uff09\uff1a\u8fd9\u4e9b\u8282\u70b9\u4e4b\u95f4\u65e0\u4e3b\u4ece\u5173\u7cfb\uff0c\u4e0d\u8fdb\u884c\u6570\u636e\u590d\u5236\uff0c\u5b8c\u5168\u72ec\u7acb\u8fd0\u884c\uff08\u53ef\u5355\u673a\u3001\u53ef\u5bb9\u5668\uff0c\u751a\u81f3\u8de8\u673a\u623f\uff09\u3002<\/li>\n\n\n\n
      2. \u5ba2\u6237\u7aef\u5b9e\u73b0\u7ea2\u9501\u903b\u8f91\u65f6\uff0c\u9700\u901a\u8fc7 \u201c\u591a\u8282\u70b9\u8bf7\u6c42 + \u6295\u7968\u201d \u7684\u65b9\u5f0f\u83b7\u53d6\u9501\uff0c\u800c\u975e\u4ec5\u8bf7\u6c42\u5355\u4e2a\u8282\u70b9\u3002<\/li>\n<\/ol>\n\n\n\n

        \u7ea2\u9501\u7684\u5b8c\u6574\u6267\u884c\u6d41\u7a0b\uff08\u4ee5 N=5 \u4e3a\u4f8b\uff09<\/h4>\n\n\n\n

        \u7ea2\u9501\u7684\u83b7\u53d6\u4e0e\u91ca\u653e\u8fc7\u7a0b\u4e25\u683c\u9075\u5faa \u201c\u5c11\u6570\u670d\u4ece\u591a\u6570\u201d \u539f\u5219\uff0c\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n

        1. \u9501\u7684\u83b7\u53d6\u9636\u6bb5\uff08\u6838\u5fc3\uff1a\u6ee1\u8db3 \u201c\u591a\u6570\u8282\u70b9\u6210\u529f\u201d\uff09<\/h5>\n\n\n\n

        \u5ba2\u6237\u7aef\u8981\u83b7\u53d6\u7ea2\u9501\uff0c\u9700\u4f9d\u6b21\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n\n\n\n

          \n
        • \u6b65\u9aa4 1\uff1a\u751f\u6210\u552f\u4e00\u6807\u8bc6\uff08UUID\uff09<\/strong>
          \u5ba2\u6237\u7aef\u751f\u6210\u4e00\u4e2a\u5168\u5c40\u552f\u4e00\u7684 Value\uff08\u5982 UUID + \u7ebf\u7a0b ID\uff09\uff0c\u7528\u4e8e\u540e\u7eed\u533a\u5206 \u201c\u81ea\u5df1\u7684\u9501\u201d \u548c \u201c\u5176\u4ed6\u5ba2\u6237\u7aef\u7684\u9501\u201d\uff0c\u907f\u514d\u8bef\u91ca\u653e\u4ed6\u4eba\u7684\u9501\u3002<\/li>\n\n\n\n
        • \u6b65\u9aa4 2\uff1a\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\uff08TTL\uff09<\/strong>
          \u5b9a\u4e49\u4e00\u4e2a \u201c\u9501\u83b7\u53d6\u8d85\u65f6\u65f6\u95f4\u201d\uff08\u5982 50ms\uff09\uff0c\u786e\u4fdd\u5ba2\u6237\u7aef\u5411\u5355\u4e2a Redis \u8282\u70b9\u8bf7\u6c42\u9501\u65f6\uff0c\u4e0d\u4f1a\u56e0\u8282\u70b9\u6545\u969c\u5bfc\u81f4\u957f\u65f6\u95f4\u963b\u585e\uff08\u8d85\u8fc7\u8be5\u65f6\u95f4\u5219\u653e\u5f03\u8be5\u8282\u70b9\uff0c\u89c6\u4e3a\u8bf7\u6c42\u5931\u8d25\uff09\u3002<\/li>\n\n\n\n
        • \u6b65\u9aa4 3\uff1a\u5411\u6240\u6709 N \u4e2a\u8282\u70b9\u53d1\u8d77\u9501\u8bf7\u6c42<\/strong>
          \u5ba2\u6237\u7aef\u540c\u65f6\uff08\u6216\u4e32\u884c\u4f46\u5feb\u901f\uff09\u5411 5 \u4e2a\u72ec\u7acb Redis \u8282\u70b9\u53d1\u9001 \u201c\u83b7\u53d6\u9501\u201d \u7684\u6307\u4ee4\uff0c\u6307\u4ee4\u683c\u5f0f\u4e0e\u5355\u673a\u9501\u4e00\u81f4\uff1a
          SET lock_key \u552f\u4e00UUID NX EX \u9501\u6709\u6548\u671f<\/code>\uff08NX<\/code> \u8868\u793a \u201c\u4e0d\u5b58\u5728\u5219\u521b\u5efa\u201d\uff0cEX<\/code> \u8868\u793a \u201c\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u201d\uff0c\u5982 10 \u79d2\uff0c\u907f\u514d\u9501\u6c38\u4e45\u5360\u7528\uff09\u3002
          \u6ce8\u610f\uff1a\u6bcf\u4e2a\u8282\u70b9\u7684\u8bf7\u6c42\u90fd\u9700\u72ec\u7acb\u8ba1\u65f6\uff0c\u8d85\u8fc7 \u201c\u9501\u83b7\u53d6\u8d85\u65f6\u65f6\u95f4\u201d\uff08\u5982 50ms\uff09\u5219\u89c6\u4e3a\u8be5\u8282\u70b9\u8bf7\u6c42\u5931\u8d25\u3002<\/li>\n\n\n\n
        • \u6b65\u9aa4 4\uff1a\u5224\u65ad\u662f\u5426\u83b7\u53d6\u9501\u6210\u529f<\/strong>
          \u5ba2\u6237\u7aef\u7edf\u8ba1 \u201c\u8bf7\u6c42\u6210\u529f\u7684\u8282\u70b9\u6570\u91cf\u201d\uff0c\u82e5\u6ee1\u8db3\u4e24\u4e2a\u6761\u4ef6\uff0c\u5219\u8ba4\u4e3a\u7ea2\u9501\u83b7\u53d6\u6210\u529f\uff1a
          \u2460 \u6210\u529f\u7684\u8282\u70b9\u6570\u91cf \u2265 (N\/2) + 1<\/code>\uff08\u5373\u591a\u6570\u8282\u70b9\uff0cN=5 \u65f6\u9700 \u22653\uff09\uff1b
          \u2461 \u6240\u6709\u6210\u529f\u8282\u70b9\u7684\u603b\u8017\u65f6 \u2264 \u9501\u6709\u6548\u671f\u7684 1\/3\uff08\u907f\u514d\u56e0\u8017\u65f6\u8fc7\u957f\uff0c\u5bfc\u81f4\u90e8\u5206\u8282\u70b9\u7684\u9501\u5df2\u8fc7\u671f\uff09\u3002
          \u82e5\u4e0d\u6ee1\u8db3\uff0c\u5219\u7acb\u5373\u8fdb\u5165 \u201c\u9501\u91ca\u653e\u9636\u6bb5\u201d\uff08\u91ca\u653e\u6240\u6709\u5df2\u6210\u529f\u7684\u8282\u70b9\u7684\u9501\uff09\uff0c\u907f\u514d\u6b8b\u7559\u65e0\u6548\u9501\u3002<\/li>\n<\/ul>\n\n\n\n
          2. \u9501\u7684\u6301\u6709\u9636\u6bb5\uff08\u6838\u5fc3\uff1a\u7eed\u671f\u907f\u514d\u9501\u8fc7\u671f\uff09<\/h5>\n\n\n\n

          \u83b7\u53d6\u9501\u6210\u529f\u540e\uff0c\u5ba2\u6237\u7aef\u9700\u6ce8\u610f\uff1a<\/p>\n\n\n\n

            \n
          • \u9501\u7684 \u201c\u5b9e\u9645\u6709\u6548\u65f6\u95f4\u201d = \u9501\u6709\u6548\u671f – \u9501\u83b7\u53d6\u603b\u8017\u65f6\uff08\u5982\u9501\u6709\u6548\u671f 10 \u79d2\uff0c\u83b7\u53d6\u8017\u65f6 2 \u79d2\uff0c\u5219\u5b9e\u9645\u6709\u6548\u65f6\u95f4\u4e3a 8 \u79d2\uff09\u3002<\/li>\n\n\n\n
          • \u82e5\u5ba2\u6237\u7aef\u7684\u4e1a\u52a1\u903b\u8f91\u6267\u884c\u65f6\u95f4\u53ef\u80fd\u8d85\u8fc7 \u201c\u5b9e\u9645\u6709\u6548\u65f6\u95f4\u201d\uff0c\u9700\u5728\u9501\u8fc7\u671f\u524d\u5411 \u201c\u6240\u6709\u6210\u529f\u7684\u8282\u70b9\u201d \u53d1\u8d77 \u201c\u9501\u7eed\u671f\u201d \u8bf7\u6c42\uff08\u5982 Redisson \u4e2d\u7684 renewExpiration<\/code> \u673a\u5236\uff09\uff0c\u907f\u514d\u9501\u63d0\u524d\u8fc7\u671f\u88ab\u5176\u4ed6\u5ba2\u6237\u7aef\u62a2\u5360\u3002<\/li>\n<\/ul>\n\n\n\n
            3. \u9501\u7684\u91ca\u653e\u9636\u6bb5\uff08\u6838\u5fc3\uff1a\u6e05\u7406\u6240\u6709\u8282\u70b9\u7684\u9501\uff09<\/h5>\n\n\n\n

            \u65e0\u8bba\u4e1a\u52a1\u903b\u8f91\u6267\u884c\u6210\u529f\u6216\u5931\u8d25\uff0c\u5ba2\u6237\u7aef\u90fd\u5fc5\u987b\u91ca\u653e\u9501\uff0c\u907f\u514d\u6b7b\u9501\uff1a<\/p>\n\n\n\n

              \n
            • \u5ba2\u6237\u7aef\u5411\u6240\u6709 5 \u4e2a\u8282\u70b9<\/strong>\u53d1\u9001 \u201c\u91ca\u653e\u9501\u201d \u7684\u6307\u4ee4\uff08\u5373\u4f7f\u67d0\u4e2a\u8282\u70b9\u5728\u83b7\u53d6\u9501\u65f6\u8bf7\u6c42\u5931\u8d25\uff0c\u4e5f\u9700\u5c1d\u8bd5\u91ca\u653e\uff0c\u9632\u6b62\u8282\u70b9\u6062\u590d\u540e\u6b8b\u7559\u9501\uff09\u3002<\/li>\n\n\n\n
            • \u91ca\u653e\u9501\u7684\u6307\u4ee4\u9700\u5e26 \u201c\u552f\u4e00 UUID\u201d\uff0c\u786e\u4fdd\u53ea\u91ca\u653e\u81ea\u5df1\u6301\u6709\u7684\u9501\uff08\u907f\u514d\u8bef\u91ca\u653e\u4ed6\u4eba\u7684\u9501\uff09\uff0c\u6307\u4ee4\u903b\u8f91\u901a\u5e38\u7528 Lua \u811a\u672c\u5b9e\u73b0\uff1a
              if redis.call('get', 'lock_key') == '\u552f\u4e00UUID' then return redis.call('del', 'lock_key') else return 0 end<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n

              \u4e09\u3001\u7ea2\u9501\u7684\u6838\u5fc3\u7279\u6027\uff1a\u5b89\u5168\u6027 vs \u53ef\u7528\u6027<\/h3>\n\n\n\n

              \u7ea2\u9501\u901a\u8fc7\u591a\u8282\u70b9\u5197\u4f59\uff0c\u89e3\u51b3\u4e86\u5355\u673a Redis \u9501\u7684 \u201c\u9501\u4e22\u5931\u201d \u95ee\u9898\uff0c\u5176\u6838\u5fc3\u7279\u6027\u53ef\u603b\u7ed3\u4e3a\uff1a<\/p>\n\n\n\n

              \u7279\u6027<\/th>\u8bf4\u660e<\/th><\/tr><\/thead>
              \u5b89\u5168\u6027<\/strong><\/td>\u53ea\u8981\u591a\u6570\u8282\u70b9\uff08\u22653\/5\uff09\u6b63\u5e38\uff0c\u5373\u4f7f\u5c11\u6570\u8282\u70b9\uff08\u22642\/5\uff09\u6545\u969c\uff0c\u9501\u4ecd\u80fd\u6b63\u5e38\u83b7\u53d6 \/ \u91ca\u653e\uff0c\u907f\u514d\u5355\u8282\u70b9\u6545\u969c\u5bfc\u81f4\u7684\u9501\u5931\u6548\u3002<\/td><\/tr>
              \u53ef\u7528\u6027<\/strong><\/td>\u652f\u6301\u5c11\u6570\u8282\u70b9\u6545\u969c\uff08\u5982 5 \u8282\u70b9\u4e2d\u6700\u591a\u5141\u8bb8 2 \u4e2a\u8282\u70b9\u5b95\u673a\uff09\uff0c\u96c6\u7fa4\u4ecd\u80fd\u63d0\u4f9b\u9501\u670d\u52a1\uff0c\u53ef\u7528\u6027\u9ad8\u4e8e\u5355\u673a\u9501\u3002<\/td><\/tr>
              \u6700\u7ec8\u4e00\u81f4\u6027<\/strong><\/td>\u91ca\u653e\u9501\u65f6\u9700\u5411\u6240\u6709\u8282\u70b9\u53d1\u8d77\u8bf7\u6c42\uff0c\u5373\u4f7f\u90e8\u5206\u8282\u70b9\u6682\u65f6\u4e0d\u53ef\u8fbe\uff0c\u540e\u7eed\u4e5f\u4f1a\u56e0\u9501\u8fc7\u671f\u81ea\u52a8\u6e05\u7406\uff0c\u65e0\u6570\u636e\u6b8b\u7559\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

              <\/p>\n<\/details>\n\n\n\n

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